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Interview questions
What are the key performance tuning techniques you apply in Spark jobs to improve performance?
What is data shuffling in Spark, and how do you minimize its impact on job performance?
What is one disadvantage of using Scala for data engineering tasks?
What is the command to import data from HDFS to Hive?
What is the difference between map and flatMap in Spark transformations?
What is the difference between partitions and repartitions in Spark, and when do you use each?
Explain how Spark handles fault tolerance. How does it recover from node failures?
How do you ensure data quality in a big data pipeline, and what strategies do you use for data validation?
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